blazehash 0.2.5

Forensic file hasher — hashdeep for the modern era, BLAKE3 by default
Documentation 
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use assert_cmd::Command;
use tempfile::TempDir;
use std::fs;

fn write_manifest(dir: &TempDir) -> std::path::PathBuf {
    let p = dir.path().join("case.hash");
    fs::write(&p, concat!(
        "## case: CASE-001\n",
        "sha256  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa  docs/contract.pdf\n",
        "sha256  bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb  images/photo.jpg\n",
        "blake3  cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc  docs/notes.txt\n",
        "sha256  dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd  README.md\n",
    )).unwrap();
    p
}

#[test]
fn test_filter_by_path_glob() {
    let dir = TempDir::new().unwrap();
    let manifest = write_manifest(&dir);
    let out_path = dir.path().join("filtered.hash");
    Command::cargo_bin("blazehash").unwrap()
        .args(["filter", manifest.to_str().unwrap(),
               "--include", "docs/**",
               "-o", out_path.to_str().unwrap()])
        .assert().success();
    let content = fs::read_to_string(&out_path).unwrap();
    assert!(content.contains("contract.pdf"), "expected docs/contract.pdf");
    assert!(content.contains("notes.txt"), "expected docs/notes.txt");
    assert!(!content.contains("photo.jpg"), "images/ should be excluded");
    assert!(!content.contains("README.md"), "README.md should be excluded");
}

#[test]
fn test_filter_by_algorithm() {
    let dir = TempDir::new().unwrap();
    let manifest = write_manifest(&dir);
    let out_path = dir.path().join("filtered.hash");
    Command::cargo_bin("blazehash").unwrap()
        .args(["filter", manifest.to_str().unwrap(),
               "--algo", "blake3",
               "-o", out_path.to_str().unwrap()])
        .assert().success();
    let content = fs::read_to_string(&out_path).unwrap();
    assert!(content.contains("blake3"), "should keep blake3 entries");
    assert!(!content.contains("sha256"), "should not keep sha256 entries");
}

#[test]
fn test_filter_stdout_when_no_output() {
    let dir = TempDir::new().unwrap();
    let manifest = write_manifest(&dir);
    let out = Command::cargo_bin("blazehash").unwrap()
        .args(["filter", manifest.to_str().unwrap(), "--include", "*.md"])
        .output().unwrap();
    assert!(out.status.success());
    let stdout = String::from_utf8_lossy(&out.stdout);
    assert!(stdout.contains("README.md"), "README.md should pass *.md filter");
    assert!(!stdout.contains("contract.pdf"), "PDF should be excluded");
}

#[test]
fn test_filter_preserves_headers() {
    let dir = TempDir::new().unwrap();
    let manifest = write_manifest(&dir);
    let out = Command::cargo_bin("blazehash").unwrap()
        .args(["filter", manifest.to_str().unwrap(), "--include", "docs/**"])
        .output().unwrap();
    assert!(out.status.success());
    let stdout = String::from_utf8_lossy(&out.stdout);
    assert!(stdout.contains("## case: CASE-001"), "headers must be preserved");
}

#[test]
fn test_filter_no_match_outputs_only_headers() {
    let dir = TempDir::new().unwrap();
    let manifest = write_manifest(&dir);
    let out = Command::cargo_bin("blazehash").unwrap()
        .args(["filter", manifest.to_str().unwrap(), "--include", "nonexistent/**"])
        .output().unwrap();
    assert!(out.status.success());
    let stdout = String::from_utf8_lossy(&out.stdout);
    assert!(!stdout.contains("sha256") && !stdout.contains("blake3"),
        "no hash lines when no match, got:\n{stdout}");
}